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HMA121 from FAIRCHILD,Fairchild Semiconductor

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HMA121

Manufacturer: FAIRCHILD

FULL PITCH MINI-FLAT PACKAGE 4-PIN OPTOCOUPLERS

Partnumber Manufacturer Quantity Availability
HMA121 FAIRCHILD 100 In Stock

Description and Introduction

FULL PITCH MINI-FLAT PACKAGE 4-PIN OPTOCOUPLERS The HMA121 is a high-performance, monolithic GaAs MMIC (Monolithic Microwave Integrated Circuit) amplifier manufactured by Fairchild Semiconductor. It is designed for applications in the 0.5 GHz to 8 GHz frequency range.  

### Key Specifications:  
- **Frequency Range:** 0.5 GHz to 8 GHz  
- **Gain:** 12 dB (typical)  
- **Noise Figure:** 3.5 dB (typical)  
- **Output Power (P1dB):** +18 dBm (typical)  
- **Supply Voltage:** +5V  
- **Current Consumption:** 80 mA (typical)  
- **Package:** SOT-343 (4-lead plastic)  

The HMA121 is suitable for use in broadband communication systems, test equipment, and military applications.  

(Note: All specifications are based on Fairchild Semiconductor's datasheet for the HMA121.)

Application Scenarios & Design Considerations

FULL PITCH MINI-FLAT PACKAGE 4-PIN OPTOCOUPLERS

Alternative Part Number

  • PC817 --: Industry-standard 4-pin DIP optocoupler with similar CTR and isolation ratings, widely available and pin-compatible in most HMA121 applications.
  • LTV-817 --: Direct functional equivalent to the PC817 with comparable current transfer ratio and 5kV isolation, commonly used as a drop-in replacement for Fairchild HMA121.
  • EL817 --: Low-cost 4-pin DIP phototransistor optocoupler with similar CTR bins and isolation voltage, suitable as a second-source alternative.

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